public static void main(String[] args) throws InterruptedException {
    DateTimeFormatter formatter = DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss");
    HashedWheelTimer hashedWheelTimer = new HashedWheelTimer(10, TimeUnit.SECONDS);
    System.out.println("start:" + LocalDateTime.now().format(formatter));
    // timeout1
    Timeout t1 = hashedWheelTimer.newTimeout(timeout -> {
        System.out.println("task1 :" + LocalDateTime.now().format(formatter));
    }, 20, TimeUnit.SECONDS);
    // timeout2
    Timeout t2 = hashedWheelTimer.newTimeout(timeout -> {
        System.out.println("task2 :" + LocalDateTime.now().format(formatter));
    }, 20, TimeUnit.SECONDS);
    Thread.sleep(15000);
    t1.cancel();
    System.out.println("task1 cancel :" + LocalDateTime.now().format(formatter));
}